Improvement in call-bells



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HENRY A. DIERKES AND JOHN FRETTS, .OE NEW YORK, N. Y. ;l JOHN ERETTS ASSIGNS HISRlGrHT "lO HENRY A. DIERKES.

Letters Patent No. 112,907, dated March 21,'1871.

`IMPROVEMENT IN GALLHBELLS.

The Schedule referred to in these Letters Patent and making part of the name.

We, HENRY AsDIERKEs and J omr Fnnmrs, both e -is a specification.

Our invention consists in an improved construction of the operating mechanism of call-bells, whereby elliciency and simplicity are combined.-

Figure 1 is a vertical section of our improved bell;

Figurel, a section of a portion of the hollow standard a removed, showing the rod b, dog d, and spring f; and

Figure 3 is a plan view of the actuating parts removed, with the rod and hollow standard in horizontal section.

A is the gong, suspended in the hollow standard a, which rises from the stem of the base B.

Within the standard is the plunger-rod b, provided with a spring, k, at its lower extremity, to hold it cle.1 vated, said spring yielding when pressure is applied to the button Z to sound the gong.

In the side of the standard a is a vertical slot, through which protrndes the lower end of the springdog d, its upper end being pivoted'to the rod b. Its lower. end projects sufficiently far outside of the standard to strike the arm c of thehammer e when the button is depressed, and move it downward until the arc through which said arm travels is beyond the line of descent of the'dog.

The arm is pivoted on the stud 7a, and bent inan upward direction, to bring the hammer within the interior f the gong.

Attached to the hub of the hammer, and coiled around the stud h, is the spring f, its opposite end being secured to the stud or pin g on a bracket, l, to which the hammer-arm is hung.

When the rod b is pressed down the dog d engages with the arm c, moving it through an arc, which throws the hammer e back to `the position shown by dotted lines in g. 1, and, the arm being suddenly re leased by the continued movement of the rod, the force of the coiled spring f brings the hammer forward till it strikes the gong.

.When the pressure is removed from the button the rod rises to its former position, the dog d yielding as it passes the arm c in an upward direction, so as not to' disturb its position.

lhe dog al or its equivalent projection may be' rigidly afxed to the rod b, andthe spring i dispensed with, by making a joint in the arm c, to allow it to move out of the way of the dog when the rod rises, said joint being rigid when the dog engages the arm in its downward movement, and have the same effect; but we prefer the first-named arrangement.

This construction forms a compact and simple call bell, which is reliable in operation, and not liable tol derangement of its parts, while the mechanism is concealed within the bell by the annular jacket or case L, which may bemade. of graceful shape and give the bell a highly ornamental appearance.

XVe claim as our invention- 1 The combination of the tube a, rod b, sliding within it, andthe spring-dog el pivoted thereto, for actuating the arm c of the hammer, substantially as described, for the purpose specified.

HENRY A. DIERKES. JOHN FRE'ITS.

Witnesses:

KATE N. JONES, J. FRASER. 

